The evaluation of 'the drill of evacuation with family car' conducted in the Ibaraki prefecture comprehensive nuclear disaster exercise 2010

Ibaraki prefecture had conducted 'Drill of evacuation for employees working near the nuclear sites with family car', 'Drill of evacuation for the disabled with family car' and 'Drill of evacuation for residents living near the nuclear sites' in the Ibaraki Prefecture Comprehensive Nuclear Disaster Exercise on September 30th, 2010. This work evaluated the dynamic traffic flow of evacuees' cars during the evacuation drills with three kinds of data, i.e. questionnaire for the participants, GPS tracking data of vehicles of evacuees, and photography's shot from the ground. The opinion survey was also conducted to participants of evacuation drill to get the data of choice of measures for evacuation. Consideration based on the survey of these drills revealed important outcomes as follows. The evacuation routes should be chosen more than one per one residential district from the roads including low capacity road to ease traffic congestion and to secure substitute route. Taking into account traffic control and guiding at the intersections on the evacuation routes by policemen and staffs is very important to make the vehicles of evacuees running smoothly. Considering of the capacity and the gate size of the parking of reception center is very important to make the stream of vehicles smooth when Reception centers are chosen. Considering of the effect from experiments of participants is important for the opinion surveys to get the choice of measures of evacuation. The opinion surveys about evacuation from Nuclear disaster should be done in the wide area including the outside of the evacuation zone. (author)